I recently bought an electric guitar and hard shell case. When I'm home is it OK to keep the guitar outside of the case? We have a thermostat that controls the humidity and temperature in the house. I don't intend to be traveling much. Thank you.
No, if humidity and temperature are kept with in a decent range then there's no reason to keep it in the case. The only reasons I can think of would be to prevent dust from gathering if you're not playing it much, or maybe to keep it away from kids/pets/guests. I keep some of my guitars out on stands and they're still in great shape after around a decade so far.
No, certainly not. There's no need to keep the guitar in a hard case everytime. You can even keep your guitar on a guitar stand, since it is easily accessible rather than opening up the hard case everytime.
It is generally accepted that the air humidity should be neither too high nor too low and the temperature of the area should be about 65-75 °F. Since, changes in the moisture and temperature can cause permanent warping of the neck and other critical parts. If the humidity stays way too low, then the wood will crack and the structure will weaken.
Though, keeping the guitar in a case away from direct sunlight can help with increasing the life of the guitar.
10 Things To Keep Your Guitar In Top Condition
I have hard cases for all my guitars, but the one I use most frequently lives in a soft-sided case because it's easier to move to gigs etc.; it goes into the hard case only if it's traveling separately from me - in an aircraft hold or a tour trailer, for example. This particular guitar isn't affected by humidity, so no worries there.